Portable mixer



FIG. 1 is a front perspective view of a portable mixer showing our new design;

FIG. 2 is a side elevational view of same;

FIG. 3 is a top plan view of same;

FIG. 4 is a front elevational view of same; and

FIG. 5 is a rear elevational view of same. 

The ornamental design for a portable mixer, as shown and described. 